Indicator for beating-engine rolls and the like



Feb. 2U, 1923; /Ili. K. STUART.

INDICATOR FOR BEATING ENGINE ROLLS AND THE LIKE.

FILED OCT. 28| 1920.

Patented Feb. 2G, 19.23.

STATE-sj 'maar vPFA-'rem'Y ortica.

manana' STUART, or NnnNnH, unseen?.l

INDICATOR FOR :HEATING-ENGINE BGLJLS THE E.

Application led tctonery 28, 1920. Serial No. 420,308.

To all whom 'it may concern.'

Be it known that I, KIMBERLY STUART,

Beating-Engine Rolls and the like, fully! described and representedin the following specification and the accompanying draw- 10 ings, forming a part of the same.

This invention relates to certain improvements in devices for indicating the operation of the beating or grinding elements in machines in which the material to be treated is passed between` two co-operating elements which have a relative adjustment while the beating or grinding operation is progressing, such as the pulp'beaters or grinders used in the manufacture of paper stock.

rlFhis class of machines usually include a stationary element such as a bed l'provided with grinding or beating bars or knives with which bed co-operates a grinding element as a roll provided with beating or ygrinding bars or knives. rIhe stock to be treated is passed between these. grinding. or beating elements and is ground or beaten thereby. ln the operation of these machines, it becomes necessary due to the change of stock as it is treated, or character of stock to be ground, or for other reasons, to effect a relative adjustment of these beating or grinding elements. This adjusting movement is a gradual one, and to effect the best results 35 this adjusting movement should be regular so that the action of the grinding'eleinents on the stock is even and the stock all receives substantiallythe same amount of treatment. In this class of machines due to irregularities in the stock, as lumps of -improperly disintegrated or digested woodfor rags, for inst-ance a sudden jump is given the roll which causes the roll to move suddenly with considerable of a shock, this being particularly th`e case in cold weather where lumps of frozen pulp may be present in the stock.

In paper mill practice when these beating' or grinding machines are used for grinding or beating paper stock, their operation is watched by an operator who endeavors to regulate the grinding-elements relatively to each other as regularly and evenly as possible, and to assist him in doing this various tell-tale or indicating devices have been suggested to show him whether he was regulating the machine evenly or not. These telltale or indicating devicesv as heretofore employed, did not take care of these jumps of the roll and did not, therefore, accurately lndicate to 'the operator whether his machine was operating regularly or whether he was adjusting it regularly to the desired extent. Furthermore these tell-tale mechanisms are delicate and sudden large increases in pressure due to the injure them.

.ltis the especial object of the present invention to produce an indicating mechanism jumps is liable to seriously for machines of the character referred to, in i which the shock or jump ofthe roll is taken care of, thisjump being practically eliminated and only transmitted to the indicating mechanism in a slight degree so that the mechanism will operate evenly and apprise the operator 'as to whether his machine is working regularly and as to whether his adjustment thereof is of the required regularity and evenness, and so that the indicatlng mechanism will not be injuredby such sudden increases in pressure.

A further object ofthe invention is to produce such an indicating mechanism which may be easily and readily installed with any machine ofthe type referred to, and which shallrbe simple, durable and accurate in its action.

A further object of the invention is to produce al1-improved indicating mechanism for use in connection with the mechanism for` avoiding the shock or jump, which may be provided with a standard scale `for the -pari 'going into the beater.

v With these and other objects not specifically referred to, the invention consists in certain novel combinations and parts which will be fully described in connection with the accompanying drawings and then speciically pointed out in the claims annexed hereto. Y u i In the drawings Figure 1'is a'. side elevation of so much of a pulp beating engine embodying the invention as is necessary for anunderstanding referring first to-Figs. 1 to 3, there is prothereof. i Figure 2 is a plan view, partly broken away of a part of the indicating mechanism;

Figure 3 is a sectional side elevation',- partly broken awayy showing the mechanism 15 for operating the indicator in section, the secdtion being taken on line 3-3 of Fig. 2; an f Figure 4 is a partial side view of a modi fied construction embodying the invention which may be used.

Referring now to these drawings, the invent-ion has 'been illustrated as embodied in what is known as a. beating engine in which pulp stock is beaten and disintegrated to form the stock used in the manufacture of paper, though it will be understood that the invention is intended to be and can be einployed in other types of machines having cooperating beating or grinding elements adjustable relatively to each other during the progress of the grinding or beating operation.

. The particular vmachine illustrated includes av grinding element as a beater roll 1, provided with the usual knives 2, this beater roll bein' mounted to rotate in a beater tub 1 in which is a co-operating grinding elebeing raised to its maximum at the beginning'of a beating operation and gradually lowered as the beating operation progresses. This adjustment lmay be effected in any usual manner, as by moving the cradles 5 through a gear :and shaft connection, not

" illustrated, by means of an adjusting wheel 7, as is customary lin thi-s class of machines. A'In accordance with the invention, mechanism is provided for-indicating the downward movement of the roll `,and fortaking care of any jump caused by irre larity of the stock, so that this jump is su ciently re'- duced to permit irregularities to be indicated, and prevent injury to the indicating mechanism. While this mechanism may be varied widely in construction, it will include i Huid pressure actuated connections between the roll and the indicating mechanism, vthese connections being .of such a. character as to transmit the downward movement of the roll :to the indicating mechanism and to lessen or absorb the shock due to the jumping of the roll. As illustrated, air pressure is utilized for effecting this, although if desired under certain circumstances, Water or other fluid pressure may be employed.

In the particular construction illustrated,

-with a stem or rod 11, which is secured as by a plate 12 to the underside of one of the cradles 5, before referred to, and partakes of the'movement of the cradle.

in the bestfconstructions the connections by which the regulator is secured in operative connection with bearings of the beater roll will includel adjusting devices so that when the parts are assembled theymay be adjusted to the required position, as for instance, if the concrete base such as 10, may be made a little too high, and any play due to wear in use can be taken care of. While these adjusting devices may be of various characters, where the piston rody 11 is directly connected to the lighter bar, 'and as shown in Figs. 1 and 2, the rod is arranged se that it can be adjusted to the required extent relatively to the bar. As shown, the end of the piston rod 11 is threaded, as indicated at 11 and this threaded end extends into an internally threaded hole 11" passing throughthe plate 12, the rod being adjustably secured in position by a lock nut 12. With this construction the piston rod and piston may be turned in the cylinder to adjustthe parts as desired, sufficient space being left above the piston to provide for such adjustment which, in the majority of cases, is very slight.

Air under pressure, if air is the pressure medium employed, from a suitable source not shown is admitted through a pipe 13 to the lower portion of the cylinder 8. the admission ofthe air being controlled by a' valve 14, and, to enable the proper pressure to be determined, a pressure gauge 15 is connected to the ipe 13 through a pipe 16 located between t e cylinder and the valve the numeral 20, .the operator endeavoring` to so regulate the machine as to cause the indicating needle 19 to follow closely this' standard guide line which should be the course indicated by the needle when the mac ine is operating properly.

This indicating mechanism may be supported and connected to the pressure cylinder in any suitable manner, and the cylinder, if desired, may be directly connected therewith, the'compressibility. ofthe air in the cylinder absorbingto a large extent the shocks caused by the` jumping 'of the roll so that the action of the indicator is fairly regulated. ln the best constructions, however, the pressure cylinder will be connected with the air pressure meter or gauge throu h a second cylinder interposed between t e pressure cylinder and gauge, this second cylinder being directly connected with the gauge and helping to absorb any .sudden increase of pressure in the first cylinder so that jar and shock caused by the jumping of the roll is practically eliminated and the pressure transmitted to the gauge ris very even and regular. While various construc-y tions may be provided for effecting this, in the construction illustrated there is provided a second or auxiliary cylinder 21 which, if desired, may be cast integrally with the main cylinder 8. A pipe 22 having a reducing valve 23 therein connects the main cylinder 8 from near its bottom to the bottom of the auxiliary cylinder 21 anda small outlet pipe 24 connects theitop of the auxiliary cylinder 21'to the pressure indicating gauge.

ln the best construction'and particularly in an apparatus used in the winter time or cold Weather where there is liable to be lumps of frozen pulp passing through thel beating or grinding machine and thus cause a greater irregularity in the pressure transmitted to the cylinder, 'a reducing diaphragm or baffle 25 may be employed, this diaphragm being secured in any suitable manner in the auxiliary cylinder 21, this diaphragm together with the reducing valve 23 still further reducing the shocks coming Y from the sudden compression or expansion of the air in the cylinder l. lf ydesired,.an exhaust valve 26 may be provided anywhere in the line, as in the pipe 24 for reducing the pressure after the grinding operation has stopped and the machine is being emptied of or charged With the material that is treated thereby.

lto allow j umpin The koperation' of the device will 4be clear from this description, but may be brieiiyindicated as follows l When the machine is operated to beat or grind a charge ofmaterial the beater-roll israised to its maximum high position with respect to the bed. As, the beaterroll is thusralsedthe piston in the'cylinder 8 is raised toward the top of the cylinden Theparts are dimensioned so that when the piston is lifted by lifting the roll cradles the piston is not drawn to the top of the cylinyder but a space is left, as indicated inFig. 3 of the roll when at its maximum high a justed position. After the tion the air valve 14 is opened and air under pressure is admitted to the cylinder until the pressure gauge indicates the pressure desired to be maintained in the cylinder which may vary as desire'd depending on the type of the machine with which the apparatus is to be used. When the pressure has reached the desired degree the valve is then closed and, the beating operation begun. As this opera` tlon progresses the roll is lowered toward the bed plate by the operator throughthe hand wheel 7 and operating mechanism actui I piston has been raised to the required posiated thereby, and this lowering compresses theair in the cylinder 8. This increase of pressure is transmitted from the cylinder 8 through the reduction valve 23Ato,the cylinder 21 and thence'through-the outlet pipe 24 to the record gauge and an ink line record is made on the Kgauge recording the progress of the roll, it being understood that valve 26 is closed. .After the run is completed the beater is emptied and the operator may release the pressure through the valve 26 and the operation is then repeated, a fresh disc 18 being placed `in the gauge frame 17 for the next run. Y 4

it frequently happens, especially with machines alreadyy constructed, that the lighter bars that vsupport the beating roll come too close to the floor or other support on which the beating engine is erected to permit the insertion of the regulator between the lighter bars and such support. 1t further happens that in some types of machine the adjustment made during the beating operation is so `slight that on ac' ,j a convenient one is that shown, in which there is provided a rod 28 connected to the desired point adjacent the' engine, beinglighter bar through'the medium of the plate i 12, this connection being preferably. the adjusting connection heretofore described. This rod28 connects through a loose connection 29 with a short-arm 30 of a multiplying lever pivoted at 31 in a suitableV standard 32 rising from the floor or other suitable support. The long arm 33 of this lever is connected through a loose connection -34 and a coupling 35 with the threaded end v in a cylinder 39 and a pipe connection 40 leads to the .indicating mechanism, the movement of the piston in the cylinder causing a record to be made on the indicating dial.

The pipe 40 may lead directly from the top of the cylinder to the indicating mechanism, in which case a reducing valve, similar to valve 23 before referred to, is inserted in this pipe in any convenient place between the cylinder and the indicating device. Such construction is ordinarily suiicient where' the adjustment ofthe roll is slight and the movement of the piston has to be increased to efect a satisfactory record. `It may be desirable, however, to employ an auxiliary cylinder `like lthe cylinder 21, heretofore referred to, and such a cylinder is shown marked 41 mounted directly on the cylinder 39, and this cylinder may be provided with a removable pressure reducing diaphragm, like the diaphragm 25 before referred to, and having the same functions.A When this construction is employed the pipe 40 leading to the indicating mechanism is connected with the auxiliary cylinder 41.

Air is supplied to the cylinder 39 above the piston through pipe connections similar to those heretofore referred to, and the cylinder 39 above the piston is connected with the cylinder 41 through a pipe connection 42 provided with a reducing valve 43.

With this construction a very slight movement of the lighter bar may beincreased at the piston so as to cause the piston to have a sufficiently increased movement relatively to the movement of the bar as to produce a satisfactory record, the amount of increase in the movement being determined by the relative lengths of the arms 30 and 33 of the multiplying lever, as will be readily understood, these arms being proportioned to -produce the movement required. Furthermore, with this construction the regulator may be positioned at any desired point adjacent the beating engine and does not have to bein the j space between the lever bars and the oor, which in some instances' is very cramped.

The operation of the device is the same as that already described and need not be referred to again.

With this regulator the mill superintendent may have a permanent record of each run of the machine and can determine whether the operators are adjusting the roll relatively to the bed with the desired regularity. Furthermore by the use of a disc having a standardl auge line the operator regulates his adjusting mechanism so as to cause theindicator'needle to follow this line as closely as possible and thus keep the machine operating to the regular standard given him. Furthermore the operator can tell whether he is manipulating the machine properly, or whether irregularities in operation are due to badly prepared stock.

While the invention has been shown and described in its preferred form, it will be understood that changes and variations may be made in the mechanism whereby the results aimed, at may be effected and that mechanisms operatedby fluid ressure other than air may be employed i desired, and that the invention may be employed with beating or grinding machines of various types.

What is claimed is:

1. The combination with beating or grinding elements, of means for effecting a relative adjusting of the elements, an indicating device, and fluid pressureoperated means connected with one of the elements for causing the indicating device to vevenly indicate the movement of' the adjusted element.

The combination with -beating' or grinding elements, of means for effecting a 'relative adjustment thereof,l an indicating device, a cylinder, a piston therein connected with one of the elements, means for admit-A ting'air under. pressure to the cylinder and connections from the cylinder to the indicating device for operating the latter.

' relative adjustment thereof, an indicating device, .a cylinder, a piston therein connected with one of the elements, 'means for admitting air under pressure to the cylinder, connections from the cylinder to the indicating device for operating the latter, and pressure reducing means in the connections. v

6. rlhe combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device, fluid pressure operated means connected Vwith one of the elements for-actuating the indicating device, and pressure reducing means between the fluid pressure operated means and the indicating device.

7. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device, a cylinder, a piston therein connected withy one ofthe elements, means for admitting air under pressure to the cylinder, a second cylinder, connections between the cylinders, and connections between the second cylinder and the indicating de-4 v1ce.

8. The combination with beating. or grinding elements, of means for effecting a relative adjustment thereof, an indicating, device, a cylinder, connections between the cylinder and one of' the elements, connections from the cylinder to the indicating device, means for admitting fluid under pressure to the cylinder, and pressure reducing means in the cylinder.

9. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device, a cylinder, connections between thel cylinder and one of the elements, connections from the cylinder to the indicating device, means for admitting fluid under pressure to the cylinder, and a perforated plate in the cylinder for reducing the pressure transmitted to the indicating device.

10. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device, a cylinder, a piston therein, connected with one Aof the elements, means for admitting air under pressure to the cylinder, a second cylinder, connections between the second cylinder and the indicating device, and pressure reducing means in the second cylinder.

1l. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating vdevice,'a cylinder, a iston therein, connected with one of the elements, means for admittingair under pressure to the cylinder, a second cylinder, connections between the cylinders including apressure reducing device, connections between the second cylinder and the indicating device, and pressure reducin means in the second cylinder.

12. The combination with beating or grinding lelements, of means vfor effecting a relative `adjustment thereof, an indicating device,'. a cylinder, a piston therein connected with one of the elements, means for admitting air under pressure to the cylinder, a second cylinder, connections between the cylinders including a reducing valve, connections between the second cylinder and the indicating device, and a perforated plate rin the second cylinder.

18. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device including a removable dial and means for producing a record thereon, and iiuid pressure operating means connected with one of the elements for causing the movement of the adjusted element to be recorded on the dial.

14. The combination with a beating roll, of an'adjustable bearing therefor, a cylinder, a piston operating therein and connected with the bearing and partaking of the movement thereof, means for admiting fluid under pressure below the piston, an indicating device, and connections from the cylinder below the piston to the indicating device for operating the latter.

15. The combination with a beating roll, of an adjustable bearing therefor, a cylinder, a piston operating in the cylinder connected withy the bearing and partaking of the movement thereof, means for admitting air under pressure to the cylinder below the piston, a second cylinder, pipe connections l having a reducing valve between the cylinders and indicating device, and pipe connections from the second cylinder to the indicating device for operating the latter.

T6. The combination with a beating roll, of anl adjustable bearing therefor, a cylin 115 der, a piston therein connected with the bearing, and working in the cylinder, means for admitting air under pressure tol the cylinder below the piston, a second cylinder, pipe connections including a reducing valve between the cylinders, a removable perforated plate in the second cylinder, an indithe movement of which the indicating decaused to evenly indicate the movement of the adjusted elements. and means for increasing the movement. of the air pressure actuating means. Y

19. The combination with beating 0r grinding elements, of means for eifecting a relative adjustment thereof, an indicating device, a cylinder, a piston therein, connections including a multiplying lever between the piston and one of the elements, means for admitting luid under pressure to the cylinder, and connections between the' cylinder and the indicating device for operating the latter.

20. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof` an indicating device, a cylinder, a piston therein, connections including a multiplying lever between the piston and one of the elements, means for admitting air under pressure in the cylinder, and connections from the cylinder to the indicating device for operating the latter.

21. The combination with beating or grinding elements, of means for eifecting a relative adjustment thereof, an indicating device, a cylinder, a piston therein, conneci tions between the piston and one of the elements, said connections including means for adjusting the position of the piston, means for admltting air under pressure to the cylinder, and connections from the cylinder to the indicating device for operating the latter. 22'. The combination with beating or grinding elements, of means for effecting a relative adjustment thereof, an indicating device, a cylinder, apiston therein, a multiplying lever between the piston and one of the elements for increasing the movement of the piston, adjustable connections between the lever and one of the elements, means for admitting air under pressure to the cylinder, and connections from the cylinder to the indicating device for operating the latter. v v

23. The combination with a beating roll and co-opeyating bed, of lbearings for the roll, a rod connected to one of the bearings, a multiplying lever connected to the rod, a

cylinder, a piston therein connected to the other end of the lever, adjustable connections between the rod and the bearings, an indieating device, means for supplying air under pressure to the clinder, and connections from the cylinder to the indicating device.

In testimony whereof, I have hereunto'set my hand.

KIMBERLY STUART. 

